Extension device



.May l5, 1923.

J. DANESE EXTENSION DEVICE Filed Sept. l0 1921 3 Sheets-Sheet 1 INV ENTOR ATTORNEY 5 5 m l .vv 7. e mm M n w Q N A d. s `y M 1u. e h s 7u l 2 Ew C ET. Sm. O EDl NN. Awt DSW .NS JE Td Xe El m WITNESS:

Patented May 15, l923.

'JOSEPH' DANESE, OF PHLADELPHIA, PENNSYLVANIA.

EXTENSION DEVICE.

Application iile September 10, 1921. Serial No, 499,808.

T0 all whom t may concern Be it known that I, Josnri-i Drinnen, a

and State o1 Pennsylvania, nave invented new and useful Improvements in Extension Devices, of which the following is a speciiication.

This invention relates to extension dcvices or retractile means whereby when an article is moved away from its normal position tor use: in another location it is automatically retracted thereafter. More speciiically this invention has reference to extension means for connection to and uso in conjunction with electric light, telephones and analogous articles or everyday usage.

The primary object ot this invention is to provide a novel retractile meanst'or connection into a length of electric light, telel phone or other extension cable which will etectively recoil said cable fwhen not in luse or otherwise, as desired, whilst in no way impairing or injuring its covering or exterior surface.

Another object vof this invention is to provide a retractiledevice which is simple in construction, cheap to manufacture, ei'- iective in use, not susceptible to derangement, whilst at the same time presenting an attractive appearance.

lith the foregoing and other objects in View as willA become more apparent as this description proceeds my invention consists essentially in the novel details and features of construction, combinations and arrangements or' parts hereinafter fully set forth and more speciiically defined by the appended claims.

l'n the further disclosure of the invention lreference is to be had to the accompanying 'sheets of explanatory drawings constituting a part of this specification, and in which like characters of reference designate the same or corresponding parts in all the views.

Figure 1 is a sectional vieww-on the line 1-1 in Figure 2,- or through one form of my invention as adaptable for use in connection with an electric light extension cable with the socket and light connections shown by dotted lines.

Figure 2- is a central section taken at right angles to the preceding ligure with the cable shown woundup therein in independent spiral coils.

Figure 3- is a reduced exterior tace view of the device shown in Figures 1 and 2.

Figure L1- is a fragmentary section on the line 1 4 in Figure 2 showing the position of antifriction rollers hereinafter turther referred to.

Figure 5- is a section in Figure 2.

Figure 6- is a sectional view showing the means for connecting the cable to the inner rotatable part of the device.

Figure 7 is a sectional View of a modified form of the invention and in which the cable is ywound up into an overlapping or single spiral coil,

Figure 8- is a section on the line 8 5 in the preceding ligure.

Figure 9 is an enlarged sectional detail taken on the line 9 9 in Figure 8.

Figure lilis a perspective View otthe dash of an automobile showing the application of my invention thereto.

Figure 11- exemplifies the application of my invention to the extension cable of a telephone.

Figure 12- illustrates the application ot the invention to a reading lamp. y

Figure 13 illustrates an overhang electric street lamp having my invention asso?- ciated therewith; and,

Figure llis an enlarged sectional detail of the lamp attachment shown in the preceding figure. l

Referring to the drawings and more specii'ically to-Figures 1 to 6 inclusive, I construct a circular casing or shell oi thin sheet material and including front and back dished sections 15, 16, respectively, between which is interposed a wall or separating disc 17, said parts being Arigidly connected together by an overlap joint 18 wherebytwo compartments 19, 9.0 are provided. Axially central oi` the rontand back sections 15, 16, there is formed a recess that constitutes a bearing 21 for an inner cylindric closed in drum 2Q. which is adapted Jfor tree rotation between the bearings 21 on a square-shouldered axis or arbor pin 28 rigidlyr'secured against rotationv relative to the casingl or shell by means of cap-screws 24 and lock washers 24" in the well known ways. Securely fixed at one end as by a rivet 25 to the axis or pin 23 is one end otra spirally wound flat or recoil spring Q6 the 'other endwhereof is 'similarly attached at 27 to the inner wall of the closed in drum 22.

on the line 5 5 llxterioiily` of and centrallyA between the ends ol` the drum 22 isa circumferential.

friction-tit or integral rib' or flange 28 adapted for reerotation in achanneled. or

grooved bearing or racewayv 29 formed about the inner apertured partof the vhereinbefore referred to wall or' separating disc 17 whereby it will be seen that the drum 22 vand its connectedor integrally formed rib `or flange 28 can be .rotated about lthe axis or pin 23 in opposition to the recoil spring 26. Conveniently at two or more' intervals about the peripheral edge ot the rib or flange 281 provide notches or inset teeth 30 'for engagement by a spring influenced p'awl `or detent 31 pivoted inany convenient position within the aforesaid grooved bearing or raceway' 29 to prevent accidental back seen more particularlyby reference to Fig-- ure 401:. thedrawings; It is also to be noted from Figure lvthat the wall or separating disc 17 is also provided with'opposed angular cut out 'portions 36 forv the purpose later on explained whilstvthe rim of the device is formed with diainetrically vopposed lipped y of the drum 22 being also indented at 40 so" apertures 37 in axial alignment therewith.

In the practical application of my improved extension device to 'an electric light cable 38 for example as shown by the ligures under specific. explanation it is to be observedthat said cable is secured its medial part by passage through an aperture 39 provided for the purpose in. the circumferential-rib oi' ilange 28 the registering part that the cable 38 is crushed to oval cross secvtion as shown at 41 in Figure 3,v whilst straps or clips 42 are-or may beattached thereover to obtainv a secure attachment to the drum 22. The onel-halfof lthe cable'31 in v the compartment 1941201' yexample'--i'sthen coiled around the drum 22 ina clock-wise direction or to the "right-hand until said compartment isv filled whereupon the free end "is threaded through one'otl the angular cut out portions 36 and registering peripheral 'lipped aperture 37 to have connection with. a `screw plug 43-Figure 1-for attachment to a wall or ceiling socket 44 in the well known way. In like manner the-other half of the kcable 38 is wound in ay clockwiseor right handed direction about' the drum 22 in"` the 'compartmentv 20 with its free end passing out l:mize friction in its rotation.

of the opposed angular cut-out portion 36 and peripheral lipped aperture-37 'for attachinent to alamp socket 45 in the well known way.` Nowv it willbefperiiectly ob-v vious that a. 'pull exerted on the lamp socket 45 will result in an extension of the lamp cable 38 as desired with a consequential unwinding or' bothfha'lves otrsaid cable 38 in opposition to the recoil spring y26, whilst vthe spring influenced pawl or detentV 31'- will prevent any back motion by engaging in one v of the teeth or notches 30, when the llamp has been extended to therequisite extent. To rrecoil the cable 38- av slight Apullon the lamp socket 45 will disengage vthe pawl or detent 31. andfsaid cable will be automatically rewound into the casing under the action of the recoil spring 26 as will be clearly understood by those acquainted'w'ith the art to which my invention appertains. 1t is to be here noted that during the 'extension or retraction oit the cable 38 the antitriction and radial rollers 33, 34, serve to-prevent any binding `thereof as well as aiding inv its rapid and -tree winding or unwinding. n

1n the modified form ofv the 'invention shown by vFigures 77 Sand 9' it will-be seen Y that the casing of the extension device :isnot divided by any intermediate wall or disc 17 as hereinbetore set forth but that'Y it con-- sists ot al single compartmentv 46 whilst the drum 22 is provided with spring influenced ball bearings 47 which considerably 'gmini-k it is to be noted that! the cable 38 -is-'folded uponitself and connected by a `single strap lStill 4#further 48 at its medial or other point tothe vdrum V22 whilst it is wound spiraltashio'n `vso doubled upon" itself in a contra-clockwise or left-handed direction' only between the antifriction rollers 33. The use andope'ration of this form of the invention will' be clearly apparent from the vhereinbetore description.

`with reference toFigures 1 to 6 inclusive,r without further'elucidation. y v

yIn the turther description theV extension device will be referred in its entirety by the reference ycharacter A.

Figure 10'shows the applicationbf the extension device A to an electric light l49 attached to the dash 50 of an'automobile'l its purpose and functioning being clearly c apparent.` l

Figure 1l device A for attachment to a telephone 52 having anextension cable or wire f Figure 12 exempliiies the utility of my extension device A in connection with 'a read# ing or table lamp 54 for attachment to awall or floor socket 55.

AIn Figures y13 and 14 there is shown the application of the extension device A to an overhanging street lam-p standard '5G *supporting an arc-lamp 57 it being understood` that a latch. 58 is provided Jfor locking said illustrates theadaptation of the iso an exceedingly simple and effective extension v device for the several purposes referred to,

and whilst l have outlined practical embodiments thereof the same are not to be construed as conclusive, in that various changes and modifications in the details of construction and assembly of its parts will be obvious, and the right is hereby reserved to make such changes and variations as fairly fall within the scope of the appended claims.

Having described my invention, what I claim as new and desire to secure by Letters Patent is:

1.An extension device for cables comprising a hollow casing, an axially concentric drum mounted on ball bearings and rotatable within said casing, recoil means tending to restrain the rotation of said drum in one direction, and means for connecting a cable intermediate its ends to said drum about which it is coiled upon itself in a single plane and with the free ends thereof projecting through peripherally opposed openings.

2. An extension device for cables comprising a hollow casing divided by a centrally apertured Wall into parallel compartments, an axially concentric drum rotatably mounted within said casing, recoil means tending to restrain the rotation of said drum in one direction, a circumferential flange intermediate the ends of said drum rotatable in a grooved runway around the aperture in the aforesaid wall, notches in said flange and a spring influenced detent for arresting the rotation of the drum when desired, and means for connecting a cable intermediate its ends to said drum, one portion of said cable being wound around the drum in one compartment to the right hand and the other portion being wound around the drum in the other compartment in a like direction, the free ends of the cable projecting through diametrically opposed openings in the peripheral surface of said hollow casing.

3. An extension device for cables comprising a hollow casing divided by a centrally apertured wall into parallel compartments, an axially concentric drum rotatably mounted within said casing, recoil means tending to restrain the rotation of said drum in one direction, a circumferential flange intermedia-te the ends of said drum rotatable in a grooved runway around the aperture in the aforesaid wall, notches in said flange and a spring influenced detent for arresting the rotation of the drum when desired, ra-

dially disposed antifriction rollers in the walls of said casing, and meansI for connecting a `cable intermediate its ends to said drum, one portion of said cable being wound around the drum in one compartment to the lright handy and the other portion being wound around the drum in the other compartment in a likedirection, the free ends of the cable projecting through diametrically opposed openings in the peripheral surface of said hollow casing.`

4l. An extension device for cables comprising a hollow casing divided by a centrally apertured wall into parallel compartments, an axially concentric drum rotatably mounted within said casing, recoil means tending to restrain the rotation of said drum in one direction, a circun'iferential flange intermediate the ends of said drum rotatable in a grooved runway around the aperture in the aforesaid wall, notches in said flange and a spring influenced detent for arresting' the rotation of the drum when desired, radially disposed antilriction rollers in the walls of said casing, a cable passed through an aperture in the aforesaid circumferential flange and an indent in the rotatable drum whereby it is compressed to prevent longitudinal displacement, one portion of said cable being wound around the drum in one compartment to the right hand and the other portion being wound around the drum in the other compartment in a like direction, the free ends of the cable projecting through diametrically opposed openings in the peripheral surface of said hollow casing.

5. An extension device for cables comprising a hollow casing divided by a centrally apertured wall into parallel compartments, an axially concentric drum rotatably mounted within said casing, recoil means tending to restrain the rotation of said drum in one direction, a circumferential flange intermediate the ends of said drum rotatable in a grooved runway around the aperture in the aforesaid wall, notches in said flange and a spring influenced detent for arresting the rotation of the drum when desired, radially disposed antifriction rollers in the walls of said casing, a cable passed through an aperture in the aforesaid circumferential flange and an indent in the rotatable drum whereby it is compressed at that point, straps adjacent said llange for securing the cable against longitudinal displacement, one portion of said cable being wound around the drum in one compartment to the right hand and the other portion being wound around the drum in the other compartment in a like direction, the free ends of the cable projecting through diametrically opposed openings in the peripheral surface of said hollow casing.

rvll

centric drum rotatablymount'edwithin said casing recoil means tending to restrain th'e rotation of said drum 'in one direction, a circumferential flange intermediate the ends of said drum rotatable in a grooved runway around the aperture in the aforesaid Wall,

notches in. said flange and a spring inluenc-ed deteiit .forjarresting 'the rotation of the drum Whenvdesired, an aperture in the aforesaid circumferential flange and an indent in the rotatable drum throughwhich the cable is passed and-.secured intermedi ate its ends',-said `cable being wound around the drum inlike directions inthe parallel compartments.

In testimony whereof I affix my signature.

` lJOSEPH Daunen 

